Lister



June 1, 1937. w. H. SILVER 2,082,554

' LISTER I Filed Dec. 12, 1932 8 Sheets-Sheet 1 IN V EN TOR.

A TTORNEYS.

W. H. SILVER June 1, 1937.

LISTER 8 Sheets-Sheet 2 Filed Dec. 12, 1932 n WmNV @m fizalmm a; v

I N! ENTOR M A TTORNEYS.

June 1, 1937. w. H. SILVER 2,082,554

LISTER Filed Dec'. 12, 1952 8 Sheets-Sheet 3 A TTORNEYS June '1, 1937'. w H, ME 2,082,554

LISTER Filed Dec. 12, 1932 8 Sheets-Sheet 4 emai . IN ENTOR v cw I A TTORNEYJ.

H. SILVER June 1937.

LISTER Filed Dec. 12, 1932 8 Sheets-Sheet 5 0 o O D o a O 0 My D O O a 0 D m n m IXVENTOR. M

A TTORA'E Y1 W. HJSILVER June 1, 1937.

LISTER Filed Dec. 12, 1932 8 Sheets-Sheet 6 INVENTOR June 1, 1937. w, s v 2,082,554

IN VEN TOR.

ATTORNEYS.

W. H. SILVER June 1, 1937.

LISTER- Filed Dec. 12, 1932 8 Sheets-Sheet 8 INVENTOR.

s W m T A the form of attachments adapted to be detach- N Patented June 1, 1937 UNITED STATES PATENT- OFFICE LISTER Walter H. Silver, Moline, Ill., assignor to Deere & Company, Moline, 111., a corporation of Illinois The present invention relates generally to agricultural implements and is particularly con-' cerned with the provision of a new and improved lister for opening furrows and, usually, depositing seed therein. More specifically, the present- .invention relates particularly to implements in ably connected with farm tractors and to be, at least in part, supported and controlled thereby. Of course, more broadly considered, the principles of the present invention are equally applicable to combined tractor-implement units or the equivalent as well as to-machines where the implements are detachably associated with the tractor.

One of the principal objects of the present invention is the provision of a new and improved lister having certain novel features in connection with the means for gauging the operating depth of the furrow openers of the lister. More generically considered, the principal object of the present invention is the provision of a new and improved means for determining the operating position of the ground engaging tool means forming a part of the machine.

Another object of the present invention is the provision of new and improved means for driving the seed selecting mechanism of the'lister. According to the preferred construction, the driving means is actuated from aground engaging wheel which is driven independently of the power means on-the tractor.

Still further, another object of the present invention is the provision of certain novel features in connection with the means for leveling the lister, and another object of the present invention is the provision of improved means for raising the lister frame, that is, the tool beams and the furrow openers carried thereby, to inoperative or transport position. In this connection the present invention also contemplates the provision of improved draft connections by which the forward endof the lister frame is connected with the tractor for vertical floating movement, as a result of which when the tools are lowered to operative position they more quickly penetrate the ground to the desired operating depth.- Ir; this connection, also, the present invention contemplates means for floatingly connecting the seed selecting drive means and for controlling the vertical position thereof when the lister frame is raised and lowered to and from transport position.

' These and other objects of the present invention will be apparent from the following detailed with the tractor for substantially ver and also disposed in a vertical longitudinal plane description of the preferred constructions, illustrated in the accompanying drawings in which: Figure 1 is a vertical view taken along the line l-i in Figure 2 with certain parts being shown in section, illustrating the present invention as-embodied in a construction in whichthe forward portion of the lister frame is connectedti'c' ing movement;

Figure 2 is a top plan view of the machine illustrated in Figure 1;

Figure 3 is a fragmentary section taken along the line 33 of Figure 2 and illustrating a portion of the means for leveling the implement shown in Figures 1 and.2; 15

Figures 4, 5, and 6 illustrate different positions of the seed selecting drive means, these positions varying according to the various positions which may be assumed by the lister frame relative to the tractor propelling the same;

Figure 7 illustrates a modified construction in which the lister frame is gauged from the ground surface by a single member disposed intermediate the ends of the tool beams or lister frame 7 intermediate the lister bottoms;

, Figure 8 is a fragmentary plan view of the. gauge means shown in Figure 7; Figures 9 and .10 are, respectively, elevation and plan views of a construction embodying 30 gauge wheels adjustably associated with the'forward portion of the lister frame for controlling the position of the lister;

Figure 11 is a'vertical elevation, certain parts being shown in section, illustrating a construction in which one of the gauge wheels is utilized as a part of the driving means for the seed selecting mechanism; and

Figure 12 is a top plan view of the implement shown in Figure .11 and showing a preferred form of means'for limiting the lateral movement of the lister frame relative to the tractor.

Referring now more particularly to Figures 1, 2, and 3, the reference numeral l0 indicates a farm tractor of more or less conventional construction embodying a power plant II and laterally spaced traction wheels l2. Secured to the tractor, either" in the nature of an attachment thereto or as a more or less integral part'there of, is a lister embodying a frame structure l4 comprising a pair of generally longitudinally disposed frame members or tool beams l5 and I6 converging forwardly at their front ends and connected together in closely spaced relation bymeans of a plurality of bolts ILand suitable spacers I8. At their rear ends the frame members I5 and I6 are rigidly connected together by transversely disposed members 20 and 2|, the rearmost portions 23 and 24 of the frame members I5 and I6 being turned laterally outwardly and secured to the transverse member 20 in any manner desired. 7

The lister includes a pair of laterally spaced soil engaging tools in the nature of furrow openers 26 and 27 which are fixed to the lower ends of stub beams 28 and 29, the latter being connected with the transverse member 26 and with the forward transverse member 2|, as by bolts 3|. Preferably, the stub beams 28 and 29 are connected with the rear portion of the lister frame by means of plates or brackets 32. The stub beams 28 and 29 are each provided with a marker 35 carried by an arm 36 pivotally connected, as at 31, with a bracket 38 extending outwardly from the associated stub beam.

For causing each of the furrow openers 26 and 21 to operate at a given depth for each position at which the lister frame may be held with respect to the tractor, each of the furrow openers is provided with a shoe 4|] pivotally connected, as at 4|, with the frog of the furrow opener. A link 42 is pivotally connected, as at 43, with the shoe 46 andis provided at its upper end with a threaded shank I5 which extends through an opening formed in a bracket 46 fixed to the rear face of the transverse member 26. The threaded shank 45 is provided with a nut one on each side of the bracket 46 by which the link 42 is held in a fixed position of adjustment. The shoe 40 rides in the bottom of the furrow and causes the furrow opener to operate at a given depth for each position at which the tool frame I4 is held with respect to the tractor IIJ.

The forward draft is transmitted from the tractor I0 to the lister by means of a yielding draft connection which is so arranged as to provide for relative vertical floating movement of the forward end of the lister with respect to the tractor. As mentioned above, the forwardmost portions of the frame members I5 and I6 converge forwardly and at their forward ends the members I5 and I6 carry a pair of longitudinally spaced rollers 50 mounted on certain of the bolts IT. A draft arm 5| is pivotally connected with the tractor and comprises two fiat members 53 and 54 bolted together in juxtaposition with the upper ends thereof bent laterally in opposite directions and bolted to a U-shaped member 55 having its ends turned upwardly and pivotally supported on pivot bolts 56 and 51 to angle brackets 59 and 66 which are fixed to theunder side of the tractor II] by means of bolts 6| and 62. As best shown in Figure 1, the draft arm 5| is disposed between the rollers 50 and the forwardmost ends of the frame members I5 and I6.

The draft arm 5| is disposed substantially ver-.

tically and is capable of pivotal swinging movement about an axis defined by the bolts 56 and 51, the forwardmost ends of the frame members or tool beams being adapted to be capable of at its forward end with the bracket and at its rear end with a link 69, the latter being bolted to the lower end of the draft arm 5|. By virtue of this construction, the draft arm 5| is normally held in a position similar to that shown in Figure 1 in which the arm is substantially perpendicular to the line of draft extending from the forward end of the frame members I5 and I6 to the center of the resistance of the tools. The forward ends of the beams I5 and I6 will therefore have little or no tendency to move up or down along the arm 5| during normal operation. The draft arm may swing rearwardly about its pivot axis 56 under an abnormal'load by the yielding of the spring means included in the cushioning device 68.

The position of the tool beams I5 and I6, or

the forward end of the lister frame I4, relative thereof. The upper end of the chain I4 is connected with a pair of arms 'IIfixed to a transversely disposed rock shaft I8 journaled in bearing openings provided in a bracket I9 bolted to the under side of a rearwardly extending bracket or brace member80. A lever 8| is fixed to one end of the rock shaft I8 and is provided with a pair of latches 83 which cooperate with a notched sector 84 to lock the rock shaft I8 in any one of a plurality of adjusted positions. The sector 84 is fixedly secured to the bracket 19 in any desired manner, and the upper end of the chain I4 is connected with the arms 'I'I through links 86 or the equivalent, asbest shown in Figure 1.

It is important to note that the connection of the depth adjusting lever 8| and associated parts with the tool beams I5 and I6 is effected at a point substantially midway between the front and rear ends thereof. By virtue of this connection the tool beams, that is to say, the lister frame, is connected for substantially rocking movement about an axis which is disposed midway between the front and rear ends of the lister frame, this movement not effecting the draft transmitting relation between the front ends of the members I5 and I6 and the draft arm 5| since the members are capable of vertical floating movement by virtue of the rollers 50-50 and the vertical disposition of the draft arm 5|. While the operating depth of the furrow openers 26 and 21 can be controlled by means of the adjusting lever 8|, the up and down movements of the tractor II! have only a relatively small effect upon the lister. If, for example, the rear wheels I2 of the tractor should begin to mire down, the lowering of the rear end of the tractor merely slackens the chain I4 but does not force the lister bottoms to cut deeper, as would be the case if the lister frame were fixedly connected with the tractor. In fact, the lowering of the rear end of the tractor has the effect of changing the angularity of the draft arm 5| with respect to the vertical so that the increased angularity of the draft arm 5| creates a tendency for the front ends of the tool beams I5 and I6 to move upwardly along the draft arm 5|, which results in the lister cutting shallower and thereby lightening the load on the tractor.

any special manipulation of the adjusting lever 8|. To start plowing, it is merely necessary to adjust the lever 8| to the position corresponding to they depth at which it is desired to operate, then the lister frame can be lowered from transport position. When this is done, the points of the lister bottoms 26 and 21 will first pierce the surface of the, soil. The draft reaction will cause the beams I5 and I6 to rock forwardly,

that is, in a counterclockwise direction as viewed I in Figure l, about the point at which the chain I4 is attached to the tool beams. This causes the bottoms 26 and 2'! to be pitched downwardly to the maximum amount, thereby causing quick penetration of the bottoms. As they approach the depth to which the lever 8| is set and the chain I4 is tightened, the beams I5 and I6 are rocked rearwardly, that is, clockwise as viewed this purpose a rock shaft 9| is journaled for in Figure .1,' until the bottoms assume a level position, as determined by the adjustment of the shoe 40.

In effect therefore, the action of the tool beams I5 and I6 is, for all practical purposes, the same as would be obtained if the depth adjusting lever 8| were connected to the forward ends of the tool' beams I5 and I6 and after dropping the lister to operative position, were first thrown to its extreme forward position to permit the front ends of the beams to rock to the lower end of the draft arm 5| and after the bottoms 26 and 21 have penetrated to the desired depth, and then the lever 8| shifted rearwardly to a position corresponding to the depth at which the bottoms were to beoperated. By connecting the depth adjusting lever 8| through a chain I4 at a point intermediate the ends of the two beams I5 and I6, thereby permitting the forward ends of the beams to have a floating connection with the draft arm 5|, this extra manipulation of the depth adjusting lever to obtain quick penetration is unnecessary, the connection of the tool beams, as described above,. securing the desired quick penetration automatically.

Reference was made above to the operation of raising and lowering the tool beams I5 and I6 to and from transport or inoperative position. This is preferably accomplished through-a connection with the power lift 90 of the tractor. For

rocking movement in brackets 92 secured to the chain housings of thetractor and in a bearing block carried at, the rear of the bracket (see Figure 7). The rock shaft 9| is provided with an arm 93 to which is connecteda link 94. The latter is pivotally connected with an other link 95 which is supported at its forward end from a. pendulum link 96 pivotally carried on the tractor, as best shown in Figure 1. The forward end of the link 95 is connectedby means of a pull rod 98 with the crank arm 99 of the power lift of the tractor. The power lift 90 is of more or less conventional construction and is controlled by means of a pedal.

Therock shaft 9| is also provided with a pair of rearwardly extending arms IOI and I02, the

rear ends of which are'connected by links I03 with arms I04 mounted on a transversely disposed bail member I05. The latter is journaled in a bearing bracket I06 fixed to the right hand frame member I5 and extends through a vertically disposed slot I08 (see Figure 3) in a sector I I0 fixed to the left hand frame member I6.

The position of the left-hand end of the bail' member I05 in the slot I08 is controlled by The leveling lever, includes a forwardly extending arm portion I20 preferably formed integral I therewith, and the forward end of the arm portion is connected by'means of a link I2I with the bail member I05. By virtue of this construction the left hand portion of the lister frame may be raised or lowered by swinging the leveling lever I 5 in the proper direction, thereby leveling the lister relative to the tractor. Also, the lister is free to move vertically with respect to the tractor, by virtue of, the links 103 pivotally connecting the arms I02 on the rock shaft 9| with the arms I04 on the bail member I 05, but

sprocket I21 by which the shaft may be driven.

Power for operating the seed selecting drive shaft I26 is derived from a drive wheel I30 journaled on a bolt I3I disposed between an arm I 32 and a chain housing I33. The arm I32 has a laterally bent portion I35 at its forward end by which the arm |3I is journaled to a brace member I40 disposed between the fra'memembers I5 and'IIi. The forward end of the chain housing I33 is supported on the end of the bent portion I35, as best indicated in Figure 2. The drive wheel I30 is connected by means of sprocket and chain connection housed in the chain housing I33 with a sleeve I4I'Which is, in turn, connected by means of a chain and sprocket connection I43 with thesprocket I2I on the drive shaft I26. 1 3

By virtue of the. pivotal arrangement provided for by the arm I32 and the chain housing I33, the drive wheel I30 is free to float vertically so that power will be delivered to the seed selecting drive shaft I26, irrespective of whether the wheel I30 isoperated'in a trench or on top of a ridge.

When the lister is raised to inoperative or transport position, as by-the actuation of the power lift 90, it is desirable to prevent the drive wheel I30 from dropping down-to a position below that of the lister bottoms 26 and 21.

In order to. hold the drive wheel I30 in such postion, an S-shaped arm I50is provided and which has a rearward extension I5I nnected to the end portion I35of the arm I32 by means 40 in brackets I31 extending rearwardly and fixed of a nut I52 and to the bolt I3I by means-of remains on the ground until the bent or cam' portion I55 strikes a roller I60 carried at the end of an arm IBI fixed to the rock shaft 9|. This is the position indicated inFigure 4. With the continued raising movement of the litter, the upward movement of the lister frame It and the downward swinging of the arm I6I- carrying the roller I60 causes the drive wheel I to be rocked upwardly until the roller I60 rides over the crest of the dwell portion I55 and begins to enter the vertical portion I56 of the arm I50, as indicated in Figure 5, this figure showing the lister frame in its normally completely elevated position. In this position the drive wheel I30 is held above the lower edge of the lister bottoms.

Occasionally it is necessary to cross deep gullies with the tractor, and in such cases the lister bottomsmay strike against the ground so as to push the lister upwardly relative to the tractor beyond its normally elevated position as shown in Figure 5. In this case it is not desirable that the drive wheel I30 should be raised any further, relative to either the tractor or the lister frame, because if the drive wheel I30 is elevated to too great an extent it may strike the tractor seat. In order to prevent the drive wheel from being rocked upwardly and striking the tractor seat (not shown), the reentrant portion I51 of the arm I50 is provided with a downward bend to accommodate the upward movement of the arm I50 as a whole relative to the roller I60 so as to prevent the latter from serving to swing the drive wheel 30 any higher. -Thus, as shown in Figure 6, when the lister is raised relative to the tractor beyond its normally lifted position, the arm 6| with its roller I60, moves rearwardly,

inasmuch as the rock shaft 9| is rocked by the upward thrust on the links I03. This movement of the roller I60 not only prevents the wheel I30 from being rocked upwardly relatively to the lister frame beyond its normal full lifted position but may, if desired, be arranged to actually lower the drive wheel I30 relative to the tractor. This latter function is, of course, not essential.

In the construction illustrated in Figures 1 to 6, inclusive, the structure including the depth adjusting lever 8| for controlling the operating depth of the soil engaging tools is carried by and gauges the tools from the tractor. Under some conditions it may be preferable to gauge the operating depth of the furrow openers 26 and 21, not by means carried by the tractor, but by means operating in connection with the surface of the ground. To this end, theconstruction illustrated in Figures '7 and 8 embodies a shoe I15 pivotally connected with the lister frame bars I5 and I6, as at I16, the shoe I15 being in'the form of a curved member having a ground engaging portion I18 which is disposed substantially midway between the ends of the frame beams I5 and I6. The position of the shoe I15 relative to the lister frame is controlled through a connection comprising a link I19 pivotally connected to the shoe and to the end of an arm I fixed to the. center of a rock shaft I8I shaft is provided with an arm I fixed thereto,

the upper end of the arm being pivotally connected to a link I81 which extends rear 'ardly andwhich is, in turn, connected to the lower end of a depth adjusting lever I88 pivotally connected, as at I90, to one of the lister beams I5 and I6. The depth adjustinglever I88 includes the usual detent mechanism I9I operating in conjunction with a sector I92 fixed in any manner desired to the lister beam I5.

In view of the fact that the ground contacting portion I18 of the shoe I15 is disposed substantially midway between the ends of the beams I5 and I6 and is also disposed in a vertical longitudinal plane passing substantially midway between the furrow openers 26 and 21, the operation of the construction shown in Figures '7 and 8 is similar to the construction shown in Figures 1 and 2 as regards the vertical floating movement of the front end of the lister beams. The depth at which the lister operates is, however, entirely independent of the tractor, since the depth adjusting means comprises a member which is in contact with the ground surface and is not, as is the depth adjusting lever 8| shown in Figures 1 and 2, supported on the tractor. In the construction shown in Figures '7 and 8, the tractor may rise or sink but the lister will not be effected since the position of the lister beams I5 and I6 relative to the ground is gauged the ground surface.

served that the shoe I15'serves a purposesim ilar to the chain 14 in Figure l in providingan intermediate axis about which the lister frame has rocking movement so that the front ends of the lister beams are floatingly connected with the substantially vertically disposed draft arm 5|.

The form of the invention illustrated in Figures l and 2 contemplates the provision of depth adjusting means on the tractor for determining I the operating position of the furrow openers,

whereas the form of the invention shown in Figures 7 and 8 just described contemplates the provision of gauge means operating on the surface of the ground. In both of the forms described above, however, the lister frame is leveled by adjustable means associated with the lifting connections. In the form of the invention shown in Figures 9 and 10 and now about to be described, both the gauging and the leveling operations are performed by ground engaging means. Leveling from the surface of the ground has certain advantages, as compared with leveling from the tractor. For example, whenever the tractor tilts due to irregularities in the ground surface, the lister is also constrained to tilt to the same extent. However, where the lister is leveled from the ground surface, the tractor is capable of tilting laterally without affecting the position, of the lister. In the structure illustrated in Figures 9 and 10, the leveling of the lister, as well as the operating depth of the soil engaging tools, is controlled entirely by two laterally spaced wheels 20I and 202. These wheels are journaled on the ends of axles 203 and 204 which are adjustably fixed by means of U-bolts 205 to the ends of arms 201 which are formed integral with shafts 208 and 209, respectively, the latter shafts being journaled in sleeve members 2I0 and 2H fixed rigidly to and extending laterally outwardly from a plate 212 bolted between the front ends of the lister beams I5 and I6. In effect, therefore, the axles 203 and 204 and the associated shafts 209 and 209 form crank axles adjustably connected with the lister frame and capable of rocking movement to raise or lower the gauge wheels 20I and 202 with respect thereto.

The shafts 208 and 209 may be individually by means ofbolts 220.

lister bottoms 26 and 21.

Through the adjustment of the levers 2I3 and 2M the front ends of the lister beams- I5 and I6 may be adjusted to any vertical position, thereby adjusting the operating depth of the By adjusting one of the levers independently of the other, the lateral tilt of the lister frame I4 may be adjusted. Since in this form the lister is leveled by the independent adjustment of the levers 2I3 and 30 2M, the lifting connections in this form are somewhat simplified as compared with the lifting connections shown in, for example, Figures 1 and 2. In this form the lister frame is directly connected with the arms IN and I02 of .7 the rock shaft SI by flexible connections, such as the chains 22L It is possible to utilize a triangular swingably mounted plate 222 instead of the pendulum link 96 and the link member 95 shown in Figure 1.

The wheels 20I and 202 may be adjusted to any lateral position by merely loosening the U-bolts 205 and shifting the axles 203 and 204 to the desired position. The extreme inner position is shownin Figure 10 in dotted lines, and when the wheels I and 202 have been adjusted to positions approaching that indicated in Figure 10 by the dotted lines the tractor may be driven forwardly away from the lister after the latter has been disconnected therefrom, the traction wheels I2 clearing thegauge wheels MI and 202. Normally, however, in operation these gauge wheels are generally positioned forward of the traction wheels, as indicated in full lines in Figure 10. It is to be noted that in the modification shown in Figures 9 and 10, as in the construction shown in Figures I and 8, the depth at which the lister operates is controlled entirely independently of the tractor by ground engaging means, the lister having, however, floating engagement with the draft arm 5| which is secured underneath the tractor I0.

Figures 11 and 12 illustrate the form of lister which, like the construction shown in Figures 1 and 2, includes means for holding the lister against lateral tilting and also means serving as a ground engaging wheel for driving the seed selecting mechanism. The lister shown in Figures 11 and 12 is also, like the constructions described above, adapted to be raised and lowered by means connected with the power lift of the tractor and to be adjusted for depth of operation by manually controlled lever means.

Referring now more particularly to Figures 11 andl2, the lister frame I4 is connected at its forward end with a U-shaped draw bar 300 of conventional construction carried by the tractor, the lister connection being'efiected by m ans of a plate 305 bolted between the lister beams l5 and I6 and which is, in turn, connected to any one of a series of holes 306 in the draw bar by means of a clevis 301. Preferably, as illustrated in Figure 12, the U-shaped draw bar 304 is disposed in a forward position, ratherthan ina conventional rearward position, whenever the lister is attached thereto. v

The lister in this form of construction includes a pair of gauge Wheels 30I and 302 which are journaled on the ends of crank axles 309 and 3I0, the-latter being journaled in brackets 3H and 3I2 bolted to the sides of the lister beams l5 and I6 and in brackets (H3 and 3M fixed to the brackets 3H and 3I2.

The position of the wheels 3M and 302 with respect to the lister frame is controlled by means of a pair of rock shafts 320 and '32I journaled in brackets 322 and 323 fixed, respectively, to the sides of beams I5 and I5 and 28 and 29. The rock shafts 320 and 32I have crank portions 324 and 325 formed integrally therewith and which are connected by means of links. 326 and 321 with the crank portions of the gauge wheel axles 309 and 3I0, respectively. The position of each of the rock shafts 320 and 32I is controlled by adjusting levers 330 and 33I which are journaled on the inner ends of the shafts inside of the brackets 322. These adjusting levers are connected by means of links 332 with the ends of arms 333 formed integral with the shafts 320 and 32I. The brackets 322 are eachprovided with a sector portion 334 formed integrally therewith and which is adapted to cooperate with a latch 335 on the adjusting levers.

The drive shaft I20 for the seed selecting mechanism I is driven through a chain connection with the gauge wheel L This connection includes a sprocket 340 fixed to the hub of the gauge wheel 30I over which is trained a chain 3M, as best shown in Figure 11. A double sprocket 342 is journaled on the crank end of the rock shaft 320, the driving chain 3 being trained over one set of sprocket teeth thereof while another chain 343 is trained over the other set of teeth thereof and over a sprocket 3M fixedon the seed selecting drive shaft I26. To accommodate the change in distance between the axis of the drive shaft I26 and the axis of the crank portion of the shaft 320 on which the double socket 342 is journaled, the driving chain 343 must be run with some slack, and to take up this slack a spring tension chain tightener'345 is provided, the slack in the chain 303 and the position of the chain tightener 305 varying as" the rock shaft 320 is adjusted to different positions. By virtue of this construction it will be seen that the wheel 30I serves a dual purpose, acting not only as a gauge wheel but also as a drive wheel for operating the seed selecting mechanism.

The lister shown in Figures 11 and 12 is raised and lowered through connections with a rock shaft 360 which is somewhat different in I its construction and its support from the rock shaft 9I shown in Figures 1 and 2. Due to the fact that the lister shown in Figures 11 and 12 is disposed somewhat rearwardly as compared with the lister shown in Figures 1, and 2, the rock shaft 360 is journaled for rocking movement upon brackets 36! and 362' which are extended rearwardly and which arebolted to the chain housings of the tractor, whereby the rock 'shaft 360 is disposed at a point rearwardly of the position of the rock shaft 0i shown in Figure 2. The rock shaft 360 is provided with arms 365 and 366 secured thereto and preferably, although not necessarily, formed integral therewith, and to these arms are pivotally connected,

as at 367, a second pair of arms 369 and 310,

the latter being connected by chains 3' and 312 with the transverse frame member 2!. The portions of the arms 369 and 310 forward of the pivots 361 are formed to lie underneath the rock shaft 360 and to abut against the lower portion thereof whereby rotation of the rock shaft 360 in a counterclockwise direction as viewed in Figure 11 will cause the arms 369 and 310 to be swung in the same direction, thus lifting the lister to transport position by means of the interconnected chains 3H and 312. This operation is assisted by spring means 315 connected by suitable links to the arms 365 and 366 and anchored to the chain housings by adjustable rods 3', the latter being secured to brackets 318 bolted to plates 380 secured to the forward portions of the chain housings. The brackets 318 have portions 32 extended rearwardly and bolted, as at 382, to the brackets 36l and 362 for reenforcing the latter and for rigidly holding the rock shaft 36! in position relative to the tractor.

For the purpose of providing the lister with a certain amount of lateral flexibility with respect to the tractor and yet prevent the lister from swinging into contact with the traction wheels l2 of the tractor, a pair of links 390 and 39! (see Figure 12) has been provided and which are connected to eyes 392 and 393 fixed to the sides of the lister beams l5 and iii. The forward ends of the links 390 and 39l pass througha second pair of eyes 393 and 395 positioned in or near the end holes of the draw bar 309. Adjustable collars 396 are provided on the ends of the links 390 and 39! for limiting the lateral swinging movement of the lister with respect to the tractor. A greater or lesser amount of permissible lateral movement of the lister may be provided for by positioning the collars 396 at the proper points on the links 390 and 39l.

As in the construction illustrated in Figures 9 and 10, the lister shown in Figures 11 and'12 may be leveled by the independent. adjustment of the gauge wheels 30I and 302, these gauge wheels being adjusted, as explained above, by

the adjusting levers 330 and 33L It is important to note that in this construction not only can the levers 330 and 33i be adjusted for gauging the operating depth of the furrow openers 26 and 21 but, also the gauge wheels 3M and 302 may be used for raising the furrow openers out of contact with the ground by swinging the levers 330 and 33! forwardly, thereby causing the forward ends of the cranks 320 and 3 to react against the crank axles 309 and 3l0 to raise the lister out' of the ground. It therefore follows that, if desired, the power lift means, including the shaft 360 and the arms 369 and 310,

may be dispensed with if desired and both the lifting and leveling functions performed by the simultaneous or independent adjustment of the levers 330 and 33l.

While I have shown and described above the 2 various constructions in which the principles widely different means may be employed in the practice of the broader aspects of my invention.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In an agricultural implement, a supporting frame, a generally longitudinally extending tool beam, a draft connection connecting the forward end of said beam with said frame for substantially vertical floating movement with respect thereto, a soil engaging tool carried at the rear end of said tool beam, and raising and lowering means operatively connected with said beam intermediate the ends thereof.

2. In an agricultural implement, a supporting frame, a generally longitudinally extending tool beam associated with the frame, means con necting the forward end of said tool beam with said supporting frame for relative vertical floating movement, a furrow opener carried adjacent the rear end of said tool beam, and depth adjusting means connected with said tool beam substantially adjacent the mid-portion thereof, whereby when the tool beam is lowered and the point of said furrow opener initially engages the ground the tool beam will be caused to swing about said depth adjusting means to lower the front end of said tool beam whereby the latter is disposed in a downwardly and forwardly inclined position to increase the rate at which the furrow opener enters the ground.

3. In an agricultural implement, a supporting frame, a tool beam having a soil engaging tool carried adjacent -the rear end thereof, a generally vertically disposed draft arm pivotally connected with said frame at one end, resilient means connecting the other end of said arm with said frame, means connecting the forward end' of said tool beam with said draft arm for vertical shifting movement with respect thereto, and depth adjusting means carried by said frame and including a rock shaft journaled thereon, arm means carried by said rock shaft, and a flexible connection between said last named arm and said'tool beam.

4. In an agricultural implement, a supporting frame, a tool beam having a soil engaging tool carried adjacent the rear end thereof, a generally vertically disposed draft arm pivotally connected with said frame at one end, resilient means connecting the other end of said arm with said frame, means connecting the forward end of said tool beam with said draft arm for vertical shifting movement with respect thereto, and depth adjusting means carried by said frame and including a rock shaft journaled thereon, arm means carried by said rock shaft, and means connected with said last named arm and pivotally connected with said tool beams substantially midway between the ends thereof, whereby'the rocking of said rock shaft serves to adjust the operating depth of said tool.

5. In an agricultural implement, a wheeled supporting frame, a pair of tool beams having forwardly converging ends pivotally connected with the supporting frame at a substantially central point for limited lateral swinging movement in draft transmitting relation, seeding mechanism carried by said beams, drive means for said mechanism including a ground engaging drive wheel, means for raising said drive wheel relative to the tool beams, and means for raising both said tool beams and said drive wheel relative to said supporting frame and accommodating said limited lateral movement when the tool beams are lowered.

6. In 'an agricultural implement, a wheeled supporting frame, a lister frame pivotally connected with said supporting frame, seed selecting mechanism carried by said lister frame and including a drive shaft journaled thereon, means for driving said drive shaft comprising a drive wheel, an arm pivotally connected with the lister frame and supporting said drive wheel for relative vertical floating movement, and drive transmitting means connecting said drive wheel with said seed selecting shaft, means carried by the supporting frame and operatively connected with said lister frame for raising and lowering the latter relative to said supporting frame, and means including a pair of copperating members one connected with said arm and the other carried by said supporting frame for swinging said drive wheel vertically with respect to the lister frame when the latter is shifted vertically with respect to said supporting frame by said raising and lowering means.

7. In an agricultural implement, a wheeled supporting frame, a lister frame pivotally con-. nected with said supporting frame for relative vertical movement, seed selecting mechanism carried-by said lister frame, a drive shaft therei or, means for driving said shaft including a vertically floating drive wheel, means" carried by said supporting frame for raising and lowering vertically floating drive wheel, an arm pivotally' connecting said floating drive wheel with the lister frame for vertical movement with respect thereto, a rock shaft carried by said wheeled supporting frame and operatively connected with the lister frame to raise the latter, a cam member carried by the drive .wheel arm, means carried by said rock shaft and cooperating with said cam member for raising the drive wheelrelative to the lister frame when the latter is raised by the rocking of said rock shaft relative to the supporting frame, said cam member being.

formed to provide for vertical movement of the lister frame beyond its normal elevated position without raising the drive wheel with respect to the listerframe.

9. In an agricultural implement, asupporting frame, a tool frame connected therewith for vertical movement with respect thereto, ground engaging tool means carried by said frame, a rock shaft journaled on said supporting frame and having arms swingable therewith, means connecting said arms with laterally spaced portions of said tool frame, and means for adjusting the connection between one of said arms and one portion of said tool frame for leveling the latter.

10. In an agricultural implement, a supporting frame, a generally longitudinally extending tool beam, draft means connecting the forward end of said beam with said frame for substantially vertical floating movement with respect theret in draft transmitting relation, a soil engaging tool carried at the rear end of said beam, and depth adjusting means connected with the beam substantially midway between the ends. thereof andreacting against, said supportingframe for adjusting the operating position of said tool.

11. In an agricultural implement, a supporting frame, a tool beam extending substantially longitudinally thereof, draft means connecting the forward end of said tool beam with said supporting frame and comprising a draft member with which the front end of said tool beam is shiftably connected for vertical floating movement, a soil engaging tool carried at the rear end of said 4 tool beam; and ground engaging means connected with the forward end of said tool beam for gauging the vertical position of the tool bea from the ground surface,

12. In an agricult limplement, the combination of a tract a lister adapted-t connected therewith and including a pair of erierally longitudinally disposed frame members,,soil engaging tools associated with the rear "ends of said members, the forward ends of said members converging forwardly, draft means connecting the forward y converged ends of said frame. members with the tractor in draft transmitting relation, said means comprising a substantially vertically disposed draft member with which the forward ends of said frame members are shiftably connected for vertical floating movement with respect to the tractor, transversely disposed sleeve means rigidly connected with the forward end" of said frame members, a pair of crank axles carried by said sleeve means, one crank axle being disposed at each. side of the tractor, a gauge wheel iour aled on each of saidcrankaxles, said gauge wheels being positioned ahead of the traction wheels of the tractor and adjustable transversely of the tractor to dispose the gauge wheels closer together than said traction wheels, whereby the tract on wheels may pass over said gauge wheels, and means forindividuallv swinging each of said crank axles for controlling the vert cal position of said frame members with respect to the ground.

13. In an agricultural implement, a supporting frame, a tool beam associated therewith and extending substantially longitudinally thereof, draft means connecting the forward end of said beam with said supporting frame, a crank axle journaled on said beam and having a gauge wheel mounted on the crank portion thereof, a soil engaging tool carried by said beam, a second crank axle journaled on said beam and having its crank portion link connected with the crank portion of said gauge wheel crank axle, and means mounted on said beam and connected with said second crank axle for raising and lowering said tool beam with respect to said gauge wheel.

14. In an agricultural implement, a supporting frame having supporting wheels, a-tool frame associated therewith and provided with soil engaging tool means, draft means connecting the forward end of said tool frame with said supporting frame for swinging movement in a substantiallyvertical plane, a crank axle journaled on said tool frame and having a crank portion extending rearwardly, a ground engaging gauge wheel journaled on said crank portion for determining the operating position of the tool means carried by said tool frame, a shaft jour=- 'naled on said tool frame and having a forwardly disposed arm portion positioned substantially above the crank portion of said gaucwheel crank axle, link means connecting the arm portion of said shaft with the crank portion of said crank axle, and means connected with said shaft for swinging the gauge wheel crank axle to vary the operating depth of said tool beams.

15. In an agricultural implement, a wheeled vmg rear traction wheels,

supporting frame, a lister frame associated therewith and comprising a pair of generally longitudinally disposed laterally spaced frame members connected together adjacent their forward ends, laterally spaced soil engaging tools carried bysaid lister frame, draft means connecting the forward ends of said frame members with said supporting frame, a pair of crank axles, one disposed at each side of the lister frame and each including a substantially rearwardly extending crank portion, a gauge wheel mounted on each of said crank portions and disposed substantially rearwardly of the rear wheels of said supporting frame, a pair of shafts journaled on said lister frame and each having an arm portion extending forwardly to a point substantially vertically above the axis of said gauge wheels, links connecting "the arm portions of said shafts with the crank portions of said gauge wheel crank axles, means for individually rocking each of said shafts for adjusting the vertical position of said lister frame with respect to the ground surface, seed selecting mechanism carried by said lister frame and including a drive'shaft, and means for driving said shaft from one of said gauge wheels and including a sprocket driven by one gauge wheel,

a second sprocket mounted on said shaft, a double sprocket mounted on the crank portion of the associated upper crank axle; and sprocket chains connecting said double sprocket with the sprockets mounted, respectively, on said one gauge wheel and said drive shaft for transmitting drive from said gauge wheel to the latter.

16. In an agricultural implement, in combination a tractor having a draw bar with ends tudmally extending members and a transversely disposed frame bar, a pair of stub beams disconnected with the tractor and an intermediate portion disposed forwardly of said ends, a lister vframe comprising a pair of generally longitudinally disposed frame members converging forwardly at their front ends and provided with laterally spaced soil engaging tool means at their'rear ends, means connecting the forward ends of said members with the intermediate portion of said draw bar in draft transmitting relation and for lateral swinging movement relative thereto, a pair of links, and means respectively connecting the front and rear ends of the lister frame with respect to the tractor, one a of the connectingmeans for each link establishing a pivot, and the other connecting means being arranged for limited generally longitudinal displacement.

17. In an agricultural implement, in combination, a tractor having a draw bar having ends connected with the tractor and an intermediate portion disposed forwardly of said ends, a lister frame comprising a pair of generally longitudinally disposed frame members converging forwardly at their front ends and provided with laterally spaced soil engaging tool means at their rear ends, means connecting the forward ends of said members with the ntermediate portion of said draw bar in draft transmitting relation and for lateral swinging movement relative thereto, and means comprising a pair of link members pivotally connected at their rear ends respectively with said frame members and connected at their forward ends for limited generally longitudinal displacement with the intermediate portion of said draw bar adjacent the ends thereof for limiting the lateral movement of the lister frame with respect to the tractor.

18. In an agricultural implement, a wheeled supporting frame having rear wheels, a tool frame associated therewith and comprising a pair of generally longitudinally extending frame members having. their forward ends disposed in converging relationship and their rear ends spaced apart, a transverse frame bar connected with said frame members and extending laterally outwardly thereof, a pair of stub beams connected at their forward ends with said transverse frame bar laterally outwardly of said longitudinal frame members, and a rear transverse member connected with said stub beams and said longitudinal frame members adjacent the rear ends of the latter, U-shaped draw bar means supported by said wheeled supporting frame with its intermediate portion disposed forwardly and its ends connected with said supporting frame alongside said wheels, the forward converging ends of said longitudinal frame members being pivotally connected with said intermediate portion of the draw bar, and means providing a limited amount of lateral swinging of said tool frame, said means comprising connections disposed in the space between said wheels and extending from the converging portions of said longitudinal frame members to said draw bar means at points laterally of the point of pivotal connection of said longitudinal frame members therewith. .J

19. In an agricultural implement, a wheeled supporting frame, a tool frame associated therewith and comprising a pair of generally longiposed alongside said longitudinal members and verse frame bar for raising and lowering said tool frame.

20. An agricultural implement comprising a;

wheeled supporting frame, a tool frame associated therewith and including a pair of generally longitudinally extending members and a transverse member connected therewith and extending laterally outwardly thereof, a pair of stub beams having their forward ends secured to the laterally outer portions of said transverse member, soilengaging tools on said beams, said stub beams being disposed laterally outwardly of the rear portions of said longitudinal members, laterally outwardly directed bracket means carried by each of said longitudinal members forward of said transverse member, a crank axle journaled in each of said bracket means and including a crank portion extending rearwardly to a point adjacent the soil engaging tool of the associated stub beam, a gauge wheel mounted on said crank axle, and means supported on said stub beams and the adjacent rear portions of said longitudinal members for adjusting the position of said crank axles.

21. An agricultural implement comprising a wheeled supporting frame, a tool frame associated therewith and including a pair of generally beams having their forward ends secured to the laterally outer portions-of said transverse member, said stub beams being disposed laterally outwardly of the rear portions of said longitudinal members, laterally outwardly directed bracket means carried by each of said longitudinal members forward of said transverse member, a crank axle journaled in each of said bracket means and including a crank portion extending rearwardly m to a point adjacent the associated stub beam', a

gauge wheel mounted on said crank axle, a second transverse member connecting the rear portions of said longitudinally extending members and the rear portions of said stub beams, and

means supported on both the stub beams and said longitudinal members for adjusting the position of said crank axles.

22. In an agricultural implement, a supporting frame, a tool beam associated therewith and extending substantially longitudinally thereof, draft means connecting the forward end of said beam with said supporting frame, a crank axle journaled on said beam and having a gauge wheel mounted on the crank portion thereof, a

soil engaging tool carried by said beam, a member journaled on said beam and having a crank portion link connected with the crank portion of said gauge wheel crank axle, and means mounted on said beam and connected with said member for raising and lowering said tool beam'with respect to said gauge wheel.

23. In an agricultural implement, a supporting frame, a pair of generally longitudinally extending tool beams connected therewith, seed selecting mechanism carried by said tool beams, a separate gauge wheel for each of said beams, a separate crank axle mounted on each of said beams and each having a rearwardly extending crank portion on which the associated gauge 40 wheel is mounted, means for adjusting the height of the beams with respect to the gauge wheels and comprising a member connected to the crank portion of each crank axle for shifting the latter, and means for driving said seed selecting mechanism including a chain driven from one of said gauge wheels and sprocket means movable with said last mentioned member.

24. An agricultural implement comprising a wheeled supporting frame, a pair of toolbeams associated therewith and connected thereto atthe forward ends thereof, a gauge wheel associated with each tool beam, a crank axle on each beam to receive the gauge wheel associated therewith, each of said crank axles having a I 5 rearwardly extending crank, an adjusting lever for each of said tool beams, each lever having an arm fixed with respect thereto and link con nected to the crank portion of the associated crank axle, seed selecting mechanism carried by 0 said tool beams, and means for driving said seed selecting mechanism from one of said gauge wheels, said means including a transverse seed selecting shaft having a sprocket thereon, a double sprocket carried by said lever arm, a 5 chain connecting said double sprocket and the sprocket on said seed selecting shaft, and a second chain connecting said double sprocket with said one gauge wheel.

25. In an agricultural implement, a support- 0 ing frame, a pair of generally longitudinally exengaging tool means carried by said tool beams adjacent the rear thereof, a separate gauge wheel for each of said beams, a separate crank 5 axle mounted on each of said beams and each tending tool beams connected therewith, ground having a rearwardly extending crank portion on which the associated gauge wheel is mounted in a posiiton adjacent the associated tool means, and means for adjusting the height of the beams with respect to the gauge wheels comprising a. member connected tothe crank portion of each crank axle for shifting thelatter. r

26. In an agriculturalimplement, a wheeled supporting frame, a tool frame associated therewith and comprising a pair of generally longitudinally extending members having their front ends converging forwardly and their rear portions disposed in substantially parallel relation, a transverse beam connected with said members adjacent the forward ends of said parallel portions, stub beams disposed alongside said parallel portions and connected at their forward ends with said transverse member, ground engaging tools carried by said stub beams, a separate gauge wheel for each tool, a separate crank axle for each gauge wheel having a rearwardly ex- .tending crank portion on which the associated gauge wheel is mounted in a position adjacent the associated tool, and means carried by each stub beam and connected with the crank portion of the associated crank axle for raising and lowering the tools.

27. In an agricultural implement, a wheeled supporting frame, a tool frame associated therewith and comprising a pairof generally longitudinally extending members having their front ends converging forwardlyand their rear portions disposed in substantially parallel relation, a transverse beam connected with. said members adjacent the forward ends of said parallel portions, stub beams disposed alongside and laterally outward of said parallel portions and connected at their forward ends with said transverse member, ground engaging tools carried by said stub beams, a separate gauge wheel for each tool, a separate crank axle for each gauge wheel and having a rearwardly extending crank portion disposed adjacent but laterally outwardly of the associated stub beams, and means carried by each stub beam and the associated longitudinally extending frame member and connected with the crank portion of the associated crank axle for raising and lowering the tools. 28. An agricultural implement comprising a wheeled supporting frame, a pair of tool beams associated therewith and connectedg'thereto at the forward ends thereof, a gauge wheel associated with each tool beam, a crank axle on each beam to receive the gauge wheel associated therewith, each of said crank axles having a generally longitudinally extending crank portion on the end of which the associated gauge wheel is mounted, an adjusting lever for each of said tool beams, each lever having an arm fixed with respect thereto and link connected with the crank portion of the associated crank axle, seed selecting mechanism carried by said tool beams, and means for drivingsaid seed selecting mechanism from one of said gauge wheels, said means forward ends disposed in converging relationship and their rear ends spaced apart and a transverse frame bar connected with said frame members and extending laterally thereof, tool means connected with said transverse bar, a gauge wheel associated with each of said frame members, a crank axle for each gauge wheel pivotally connected with the tool frame, and adjusting means for each gauge wheel including a rock shaft journaled on the associated frame member and having an operating arm disposed in substantially the same plane as and connected with the crank portion of the associated crank axle.

30. In an agricultural implement, a wheeled supporting frame, a tool frame associated there.- with and comprising a pair of generally longitudinally extending frame members having their forward ends disposed in converging relationship and their rear ends spaced apart and a transverse frame bar connected with said frame members and extending laterally thereof, tool means connected with said transverse bar, a gauge wheel associated with each of said frame members, a crank axle for each gauge wheel pivot- 'ally connected with the tool frame, addusting having a sprocket thereon, a double sprocket carried by said operating arm, a chain connecting said double sprocket and the sprocket on said seed selecting shaft, and a second chain connecting said double sprocket with said one gauge wheel.

31. In an agriculturalimplement, the combination of a tractor having rear traction wheels and associated drive housing means, a lister adapted to be connected therewith and including a tool frame associated therewith and comrising a pair ofgenerally longitudinally extending members having their front ends converging forwardly and their rear portions disposed in substantially parallel relation and a transverse beam connected with said members adjacent the forward ends of said parallel portions, means rigidly fastening said forwardly converging ends together in closely spaced relation in the central vertical plane of the tractor forwardly of the axis of said rear traction wheels, stub beams disposed alongside said parallel portions and connected at their forward ends with said transverse member, a second transverse member connected with the rear ends of said longitudinal frame members and said stub beams, soil engaging tools carried by said stub beams, draft means including a member disposed between the closely spaced forwardly converging ends of the generally longitudinally extending members for pivotally connecting said tool frame with said tractor for limited lateral swinging movement, and means including a rock shaft mounted directly on said drive housing means and operatively connected with said tool frame so as to act through said first transverse beam in raising and lowering said tool frame, including the tool-carrying stub beams thereof, and accommodating the limited lateral swinging of the tool frame.

frame, means connecting the forward end of the tool frame with the tractor for vertical swinging, a ground working tool fixed to the rear end of the tool frame, a crank axle journaled on the tool frame adjacent the rear end thereof, a gauge wheel journaled on the cranked portion of the crank axle, means mounted on the tool frame for adjusting the crank axle relative thereto whereby the depth of operation of the ground working tool may be regulated, a seeding device including seed selecting mechanism supported on the tool frame, a driving connection from the gauge wheel to the seed selecting mechanism for operating the latter, a rock shaft on the tractor, means for rocking the rock shaft, and means for connecting the rock. shaft with the tool frame for raising the ground working tool and the gauge wheel out of operating position.

33. In an agricultural implement, a wheeled supporting frame, a tool frame associated therewith and comprising a pair of generally longitudinally extending tool beams having their forward ends disposed in converging relationship and their rear ends spaced apart, means connecting the forward ends of said tool beams with said supporting frame 'so that the tool frame is capable of limited rocking movement relative 1 thereto about a generally longitudinal axis, a transverse frame bar connected with said tool beams and extending laterally thereof, tool means connected with said transverse bar, a gauge wheel associated with each of said tool beams, a crank axle for each gauge wheel pivotally connected with the tool frame forward of said transverse frame bar, and adjusting means for each gauge wheel including a member rockably mounted on the associated tool beam, rearwardly of said transverse frame bar and having an operating arm disposed in substantially the same plane as and connected with the associated crank axle.

34. In an agricultural implement, a wheeled supporting frame, a tool frame associated therewith and comprising a pair of generally longitudinally extending tool beams having their forward ends disposed in converging relationship and their rear ends spaced apart, means connecting the forward ends of said beams with said supporting frame so that the tool frame is capable of limited rocking movement relative thereto about a generally longitudinal axis, a

-transverse frame bar connected with said tool beams and extending laterally thereof, tool means connected with said transverse bar, a gauge wheel associated with each of said tool beams, a crank axle for each gauge wheel pivotallyconnected with the tool frame forward -of said transverse frame bar, means serving as and their rear ends spaced apart and a transverse frame bar connected with said tool beams and extending laterally thereof, tool means connected with said transverse bar, a laterally out- Ward ends disposed in converging relationship 7 wardly extending member rigidly secured to each 7 bination of a tractor, a listeradapted to be connected therewith and including a tool frame associated therewith and comprising a pair of generally longitudinally extending tool beams and a transverse member connected with said tool beams, stub beams disposed alongside-and laterally outwardly of the rear portions of said tool beams and connected at their forward ends with said transverse member, a second transverse member connected with .the rear. ends of said longitudinal tool beams and said stub beams, soil engaging tools carried by said stub beams, means connecting the-forward ends of the generally longitudinally extending tool beams with the tractor for limited lateral tilting movement relatively thereto, means serving as a laterally extending bracket member rigidly connected with each of said generally longitudinally extending tool beams a pair of crank axles for the tool frame, one crank axle being mounted in each of said rigid bracket means and disposed forwardly of said transverse members, and an adjusting mechanim for each of said crank axles including an adjusting lever associated with each crank axle and mounted for rocking movement in a position between said transverse members laterally outwardly of the associated longitudinally extending tool beam and laterally inwardly of the stub beam at that side of the implement. a

37. An agricultural implement comprising a wheeled supporting frame, a tool frame associated therewith and including a pair of generally longitudinally extending members and a transverse member connected therewith and extending laterally outwardly thereof, a pair of stub beams having their forward ends secured to the laterally outer portions of said transverse member, soil engaging tools on. said beams, seed se-.

lecting mechanisms carried by said tool frame above said stub beams, and means for driving at least one of said seed selecting mechanisms including a seed selecting shaft, a crank arm n having a journal portion connected with the tool frame for rocking movement about a transverse axis, and a wheel receiving end, aground engaging wheel carried by said wheel receiving end for vertical movement relative to said frame, and an articulated chain and sprocket connection between said wheel and said seed selecting shaft for driving the latter from saidground engaging wheel.

38. An agricultural implement comprising a wheeled supporting frame, a tool beam associated therewith and connected thereto at its forward end, a gauge wheel associated with said tool beam, a crank axle mounted for rocking movement on said beam to receive the gauge wheel associated therewith, said crank axle having a generally longitudinally extending axle portion on the end of which said gauge wheel is journaled, an adjustinglever rockably mounted on said tool beam and having a arm fixed with respect to the lever and link connected' with the axle portion of said crank axle, seed selecting mechanism carried by said tool beam, and means for driving said seed selecting mechanism from the gauge wheel, said means including a generally transverse seed selecting shaft having a sprocket thereon, a double sprocketcarried at the end of said operating arm, chain means connecting said double sprocket and the sprocket on said seed selecting shaft, and a sprocket chain connecting said double sprocket with said gauge wheel.

39. An agricultural implement comprising a wheeled supporting frame, a pair of tool beams associated-therewith and connected thereto at the forward ends thereof, a gauge wheel associated with each tool beam, a crank axle on each beam to receive the gauge wheel associated therewith, each of said crank axles having a generally longitudinally extending crank vportion on the end of which the associated gauge Wheel is mounted, an adjusting lever for each of said tool beams, each lever having an arm fixed with respect thereto and link connected with the crank portion of the associated crank axle,- seed selecting mechanism carried by said tool beams, and means for driving at least one of said seed selecting mechanisms from one of said gauge wheels,-said means including a seed selecting shaft having a sprocket thereon, a double sprocket carried by said operating arm, sprocket chain .means connecting said double sprocket and the sprocket on said seed selecting shaft, and a. second chain connecting said double sprocket with said one gauge wheel.

' a0. An' agricultural implement comprising a wheeled supporting frame, a tool frame associated-therewith and including a pair of generally longitudinally extending members and a transverse member connected therewith and extending laterally outwardly thereof, a pair of stub beams: having their forwardends secured to the laterally outer portions of said transverse member, soil engaging tools-on said beams, seed selecting mechanisms carried by said tool frame above said stub beams, and means for drivingat least one of said seed selecting mechanisms including a. seed selecting shaft, a crank arm having a journal portion connected with the tool frame for rocking movement about a transverse axis and a wheel receiving end, a ground engaging wheel carried by said wheel receiving end for generally vertical movement relative to said frame, an articulated chain and sprocket connection betweensaid wheel and said seed selecting shaft for driving the latter from said ground engaging wheel, and lever means pivotally connected with said tool frame and reacting against said crank arm for shifting the position of the latter relative to said frame.

'41. An agricultural implement comprising a wheeled supporting frame, a tool frame associated therewith and including a pair of generally longimechanisms including a seed selecting shaft,

journaled for rotation on said tool frame, a

crank arm having a journal portion connected with the tool frame for rocking movement about a transverse axis and a wheel receiving end, a

42. An agricultural implement comprising a wheeled supporting frame, a tool frame associated therewith and including a pair of generally longitudinally extending members and a transverse member connected therewith and extending laterally outwardly thereof, a pair of stub beams having their forward ends secured to the laterally outer portions of said transverse member, soil engaging tools on said beams, seed selecting mechanisms carried by said tool frame, means for driving at least one of said seed selecting mechanisms including a seed selecting shaft, a crank arm having a journal portion connected with the tool frame for rocking movement about a transverse axis and a wheel receiving end, a ground engaging wheel carried by said wheel receiving end for generally vertical movement relative to said frame, an

articulated chain and sprocket connection between said wheel and said seed selecting shaft for driving the latter from said ground engaging wheel, means for raising said tool frame relative to said wheeled supporting frame, and lever means connected with one of said frames and adapted to react against said crank arm when the tool frame is raised'to preventthe crank arm and ground engaging wheel from swinging downwardly relative to the tool frame when the latter is raised. g

'43. An agricultural implement comprising a wheeled supporting frame, a tool frame associated therewith and including a pair of generally longitudinally extending members and a transverse member connected therewith and extending laterally outwardly thereof, a draft connection connecting the forward end of said tool frame with said supporting frame for substantially vertical floating movement with respect thereto, a pair .of stub beams having their forward ends secured to the laterally outer portions of said transverse member, soil engaging tools on said beams, seed selecting mechanisms carried by said tool frame above said stub beams, and means for driving at least one of said seed selecting mechanisms including a seed selecting shaft, a crank arm having a journal portion connected with the tool frame for rocking movement about a transverse axis and a wheel receiving end, a ground engaging wheel carried by said wheel receiving end for vertical movement relative to said frame, and an articulated chain and sprocket connection between said wheel and said seed selecting shaft for driving the latter from said ground engaging wheel aosats-i ship and their rear ends spaced apart and a transverse frame bar connected with said tool beams and extending laterally thereof, tool means connected with said transverse bar, a laterally outwardly extending sleeve member rigidly secured to each of said tool beams adjacent their forward ends, a pair of crank axles, one rockably mounted in each of said laterally outwardly extending sleeve members, a gauge wheel mounted on each of said crank axles and adjustable transversely of the supporting frame, and raising and lowering means for each gauge wheel including a member rockably mounted on the associated tool beam rearwardly of said transverse bar and having an operating portion connected with the associated crank axle outwardly of the end of the associated laterally extending member.

- 45. In an agricultural implement, in combination, a tractor, a tool supporting iframe including a pair of beams extending forwardly beneath the tractor and converging at the forward ends thereof, and means disposed near the front of said tractor for pivotally supporting the converged forward ends of said beams on said tractor.

46. In an agricultural implement, in combina tion, a tractor having a pair of traction wheels, a ground-engaging tool-carrying frame including a pair of beams extending forwardly beneath forward ends disposed in converging relationthe tractor, the forward ends of said beams be-.-

ing brought together to a single point of support, and means disposed forwardly of said traction ,wheeis for pivotally supporting said forward said traction wheels, and means for supporting the forward ends of said beams on said body on a common pivot. 7

48. In combination with a tractor having a pair of traction wheels and a body supported thereon, a ground-working tool disposed rearwardly of said traction wheels, a supporting frame for said tool, supporting wheels for said frame disposed rearwardly of said tractor, said frame including a draft member extending forwardly beneath said tractor, and means for swingably connecting said draft member to said body at a point appreciably ahead of said traction wheels.

WALTER n. SILVER. 

